Fluid pumping and controlling means



March 4, 1941. w, s ss cNs 2,234,090

FLUID PUMPING AND CONTROLLING MEANS 2 Sheets-Sheet 1 Filed Aug. 20, 1958lNVENTOR 62 D.V\/. S ESSIONS By 9 q W ATTYS,

March 4, 1941. D. w. SESSIONS 1 34,090.

FLUID PUMPING AND CONTROLLING MEANS Filed Aug. 20, 1938 2 Sheets-Sheet 2J JG 6 J (9.2 2.2 x /0/ 30v a JJ 2% g 00o 0G0 000 7 a 3/- ,@2 F/a 5 0 OC) Q INVENTOR D.\!\l. SESSIONS Patented Mar. 4, I941 am ne FLUID PURMINGAND CONTROLLING MEANS I Donald Wilfred" Sessions, Mill H 1, London,England Application AugustZO, 1938, Serial No. 226,005 i In GreatBritain October 6, 1937' I 13 Claims. (Cl. 103-171) This inventionrelates to fluid pumping and controlling means (hereinafter referred toby the term pump) and especially, although not essentially, to pumps forsupplyingliquid under pressure into lifting jacks permanently attachedto a motor vehicle. v t 1 According to the invention the pump -com-'prises a reciprocable double acting horizontalpiston in a cylindersupplying pressure'through'a' valve-controlled pressure chamber tolifting jacks or other means, wherein a vertical bore communicatesdirectlyat its upper end-with the pressure chamber and'is associatedwith a nonreturn ball valve and each end of the cylinder communicatesdirectly withthelowerend of a single straight inwardly and upwardlyinclined bore, the upper end of which runs directly into said verticalbore or directly into a horizontal bore leading direct into the-verticalbore.

In order that'these and other features (de-' fined in the appendedclaims) of the invention may be more easily understood, a constructionalform thereof will now be described by way of example with reference tothe accompanying drawings, wherein: w l

Figure 1 is a top plan view of a pump made in accordance with theinvention;

Figures 2, 3, and 4 are Verticalsectional views on the planes 22, 3-3,and d'-4, respectively,

indicated-on Figure 1; a

Figure 5 is a rear elevational view of the pump with a cover removed;and l I Figure 6 is a fragmentary sectional View on the plane 6-6indicated in Figure 2.

The pump body 10 has a. cap II on one side closing a chamber [2 intowhich fluid enters from a supply pipe which is attached to the bot tomof the cap at I3. -The' cap also carries a cylindrical gauze filterMthat has a ring Hi on its lower end fitting frictionally into the inlethole l3 in the cap. The middle part of a double acting horizontal pumppiston l8 and its operat-' ing lever ISar'e housed in the chamber l2."The lever H] is mounted at its lower end on'a'rock- 4 ing spindle 20which is horizontal and transverse to the pump piston and extends out ofthe pump body on the opposite side to the cap and carries an operatinglever- 2|. The upper rounded end of the lever l9- engages in an openingin the 50 piston. The ends of the piston engage in cylinders (which maybe regarded-as asinglecylinder) formed by a common bore 22 in the pumpbody that is broken by the said chamber.

The ends of the cylinder here are closed by screwedplugsza, 24,'I'he'pump'body is'cast with stops 8!], 8| in its interior to limit themove-' ments of the lever l9, thereby preventing the ends of the pistonl8 'from striking the plugs 23, '24

at full stroke. Ports 25,26 lead from the charm ber l2 into thecylinders and these ports are 5- alternatelyuncovered to admitfiuid andthen closed by the piston which continues its mcve mentand'forces'fi-uid out of the'outer ends of the cylinders throughinwardly and upwardly in- I clined bores 29, 3d into horizontal bores3l,32 lo located above the piston and parallel to the rocking spindle. Theinclinedbores are formed by drilling through the open ends of the bore22. The horizontal bores have their outer ends opening into the chamberI2 and these ends'are nor 1'5' mally closed'by walls 33 held-byoppositeends of a plate spring 35 held at its middle by a return valve36 to be described later. The inner ends of the horizontal bores areconnected by vertical bores or passages 38, '39 with cylindrical wells20v or pressure chambers 4|, 42 formed in 'a common boss 40 at the topof the pump body. The inclined bores enter the horizontal bores at aposition directly below the vertical bores and in fact coincidentallyenter the vertical bores. I The 25 arrangement of the inclined bores 29,30, and the vertical bores 38, 39,-avoids the necessity for drillingbores ,through the surfaces of the casting and closing-the ends of suchbores by plugs. -A non-return valve ball 44 seats on the 303 top of eachof theseyertical passages and the ball is pressed downby ,a fiat ring 45which en-- gages the ball at one position around. its lower surface andis itself pressed down by a helical spring 46 that engages itsubstantially around 35 the whole of its upper surface. A supplementarynon-return ball 4'! is also provided in each ver-' tical passage. -Thewells il, 42 are-closed by threaded blocks or plugs 50, 5!, that carryvertical screwdown spindle valves 52, 53, having 40 hand operable knobs54,55 on the outer ends and conical valve inner ends. These valves passslidably through metal, guide ,rings 56 andthrough rubber packing rings51 andretaining members 58 which have a radial slot into which 45 thespindle of the valve is engaged whereupon the member 58 engages in arecess in--.the block (5|). These valves are adapted to close verticalports 60 leading from the fluid spaces in the wells into vertical bores6| connected at 50 their lower ends with nozzles 62 for connection tothe lifting jacks (one to the rear jacks and the other to the frontjacks). The outlet bores 62 and the ports'fil which arereallycontinuations of the bores 62, havegtheir aXesparallel-to the 5from the others. are drilled sothat each connects one of the twodirection of movement of the valve spindle, which considerablysimplifies the passage arrangements in the pump. In the bores 62 arecylindrical gauze filters 63 having rings attheir lower ends which fitfrictionally in said pipes.

i 65 for release formed in the boss 40. The three wells in plan havetheir centres at the corners of a triangle, the release well beingequidistant Two horizontal holes 66, 6!

outlet wells with the release well so that the outlet wells are inconstant communication with g each other through the release well. Thelatter communicates through a vertical pont 10 with a horizontal bore Hleading to the return valve referred to which comprises a sort ofbicycle wheel type of valve 13 except that the valve rubber 12 isshorter and engaged in an annular groove in the detachable nipple. Fluidleaving this nipple enters the chamber l2 on the inlet side of the pump.The port 10 is controlled by a-screwdown valve 15 having a conical valvepart 16 seating on the upper edge of the bore 10.

The operating lever 2| is short so as to be within the depth of the pumpbody, and is adapt- 1 ed to receive a tubular extension which is slottedso that it can engage over the valve knobs 54, 55, 15, on which are lugsthat enter the slots. The same extension is thus used both for theoperating handle and for the valve knobs.

Terms such as horizontal and upwardly, are used herein relativelyreferring to the pump in its normal position, but it should be borne inmind that the pump may be used at an angle to this hypotheticalposition.

A screwdown valve 16 controls an opening to the exterior of the pump forthe release of any air or other gas that may accumulate in the chamber12.

In operation, the valve 15 is closed and one or both of the valves 54,55 are opened. The handle 2| is then operatedwhich in turn reciprocatesthe piston I8 thereby drawing fluidin from the inlet l3, I4, l12 andsupplying the fluid under pressure through the two inclined bores 29,30, vertical bores 38, and wells 4|, 42, and thence through 60, BI and63, into the outlet openings 62. When sufilcient pressure is built up inthe outlet system one of the ball valves 33 leaves its seating andfurther operation of the pump results in fluid being ejected through thechannel 3! or 32 back into the chamber I2.

I claim:

1. A .pump comprising a casing having a horizontal bore constituting apump cylinder, a doub-le acting piston therein, a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing alsO- having a pair of upwardly andlaterally inclined rectilinear bores extending from the ends of the pumpcylinder up to the lower ends of the vertical bores, said casing alsohaving a fluid inlet adapted to "communicate with s'aid -pump cylinder,and -a non-return valve associated with the upper end of each verticalbore.

2. A pump comp-rising a casing having a horizontal bore constituting apump cylinder, a double acting piston therein, a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the-ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of horizontal boresterminating at the lower ends .of the vertical bores and a pair ofupwardly and laterally inclined bores extending from the ends of thepump cylinder up to the horizontal bores, said casing also having afluid inlet adapted to communicate with said pump cylinder, a nonreturnvalve associated with the upper end of each vertical bore and non-returnvalves associated with the horizontal bores past which fluid from thebores can pass to the said fluid inlet when the pressure of th fluid .insaid horizontal bores exceeds'a predetermined maximum.

3. A pump comprising a casing having a horizontal bore constituting apump cylinder, a double acting piston therein, a pair. of valvecontrolled pressure chambers positioned above and laterally ofiset fromthe pump cylinder and between the ends of said pump cylinder, said cas-'ing' having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, a pressure release chamber, said casing also havinga'pair of horizontal bores disposed at right angles to the piston axisand extending from the lower ends ofthe vertical bores to the pressurerelease chamber and a pair of upwardly and laterally. inclined boresextending from the ends of the pump cylinder up to the horizontal bores,said casing also having a fluid inlet adapted to communicate with saidpump cylinder, and a non-return valve associated with the upper end ofeach vertical bore.

4. A pump comprising a casing having a horizontal bore constituting apump cylinder a double acting piston therein, the ends of said cylinderterminating in bores of enlargeddiameter and providing shoulders betweenthe endsof the cylinder and said bore ofienlarged diameter, a pair ofvalve controlled pressure chambers positioned above and laterally offsetfrom the pump cylinder and between the ends of. said pump cylinder,said-casing having a pair of vertical bores one extending downwardlyfromone pressure chamber and the other extending downwardly from the otherpressure-chamber, said casing also having a pair, of inclinedrectilinear bores extending upwardly and laterally from the faces ofsaid shoulders to the lower ends of the vertical bores, said casing alsohaving afluid inlet adapted to communicate with said-pump cylinder, anda non-return; valve associatedwith the upper end of each vertical boreand plugs closing the ends of said enlargedbores,

5. A pump comprising a casing having a horizontal bore constituting apump cylinder, a doubl-e acting piston therein a pair of'valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of verticalbores one extencl ing downwardly fromone pressure chamber and the other exten ing downwardly iromthe otherpressure chamber, said'casing alsohaving a, pair communicate with saidpump cylinder, a nonreturn valve associated with the upper end of eachvertical bore, .a horizontal rocking spindle, and a lever mounted onsaid spindle. and extending upwardly from the spindle into operat ingengagement withthe piston for' reciprocating the latter.

6; A pump comprising a casing having a horizontal bore constituting apump cylinder, a doul ble acting piston therein; a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the endsof saidpump cylinder, said casinghaving a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of upwardly andlaterally inclined rectilinear bores extending from the ends of the pumpcylinder up to the lower ends of the vertical bores, said casing alsohaving a fluid inlet adapted to communicate with said pump cylinder, anda non-return valve associated with the upper end of each vertical bore,each pressure chamber having an outlet bore and a valve for controllingthe outlet, the axis of said bore being parallel to the direction ofmovement of the valve.

7. A pump comprising a casing having a horisaid casing also having afluid inlet adapted to communicate with said pump cylinder, and anon-return valve associated with the upper end of each vertical bore,said pressure chambers having outlet bores and spindle valvescontrolling the outlets, said outlet bores being in the same verticalplane as the valve spindles and to one side of the piston axis.

8. A pump comprising a casing having a horizontal bore constituting apump cylinder, :3. double acting piston therein, a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of upwardly andlaterally inclined rectilinear bores extending from the ends of the pumpcylinder up to the lower ends of the vertical bores, said casing alsohaving a fluid inlet adapted to communicate with said pump cylinder, 2.non-return valve associated with the upper end of each vertical bore,each pressure chamber having an outlet bore in the lOWer portionthereof, a screw plug closing the top of each pressure chamber, and ascrewdown valve stem carried by each screw plug and provided with aconical part adapted to seat in the upper end of the outlet bore.

9. A pump comprising avcasing having a horizontal bore constituting apump cylinder, a double acting piston therein, a pair of valve.controlled pressure chambers positioned above and laterally oiTset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of upwardly andlaterally inclined rectilinear bores extending from the'en-ds of thepump cylinderup to the lower ends of the vertical bores, said casingalso having a fluid inlet adapted to communicate with said pumpcylinder, a non return valve associated with the upper end of eachvertical bore, said pressure chambers being connected together andformed in a common boss in the pump casing, and a screw plug closing oneend of each pressure chamber.

10. A pump comprising a casing having a horizontal bore constituting apump cylinder, a double acting piston therein, a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of upwardly andlaterally inclined rectilinear bores extending from the ends of the pumpcylinder up to the lower ends of the vertical bores, said casing alsohaving a fluid inlet adapted to communicate with said pump cylinder, anonreturn valve associated with the upper end of each vertical bore, athird pressure chamber communicating with said pair of chambers andarranged therewith in triangular formation in a common boss in thecasing and adapted to communicate with said fluid inlet, and screwvalves controlling the outlets of said chambers.

11. A pump comprising a casing having a horizontal bore constituting apump cylinder, a double acting piston therein, a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of upwardly andlaterally inclined rectilinear bores extending from the ends of the pumpcylinder up to the lower ends of the vertical bores, a nonreturn valveassociated with the upper end of each vertical bore, said pump casinghaving an inlet chamber adapted to communicate with said pump cylinderand an outlet chamber adapted to communicate with said pressurechambers, and a cylindrical filter in each of said inlet and outletchambers.

12. A pump comprising a casing having a horizontal bore constituting apump cylinder, a double acting piston therein, a pair of valvecontrolled pressure chambers positioned above and laterally offset fromthe pump cylinder and between the ends of said pump cylinder, saidcasing having a pair of vertical bores one extending downwardly from onepressure chamber and the other extending downwardly from the otherpressure chamber, said casing also having a pair of upwardly andlaterally inclined rectilinear bores extending from the ends of the pumpcylinder oasing also having a fluid inlet adapted to communicate withsaid pump cylinder, and a nonreturn valve associated with the upper endof each vertical bore, said valve comprising a ball,

- an annular member having one point on its. 1 under surface engagingsaid ball and a coil spring 1 engaging a portion of the upper surface ofthe annular member extending entirely around the same.

13. Apump comprising a casing having a h-oritween the ends of said pumpcylinder, said casing having a pair of vertical bores one extendingdownwardly from one pressure chamber and the other extending downwardlyfrom the other pressure chamber, said casing also having a pair ofupwardly and laterally inclined rectilinear bores extending from theends of the pump cylinder up to the lower ends of the vertical bores,said casing also having a fluid inlet adapted to communicate with saidpump cylinder, a non-return valve associated with the upper end of eachvertical bore, a horizontal rocking spindle, and a lever mounted on saidspindle and extending upwardly from the spindle into operatingengagement with the piston for reciprocating the latter, said leverbeing housed in said casing and stops integral with the casing forlimiting the movement of said lever.

DONALD WILFRED SESSIONS

